68939399 has 8 divisors (see below), whose sum is σ = 70907088. Its totient is φ = 66977280.

The previous prime is 68939389. The next prime is 68939411. The reversal of 68939399 is 99393986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68939399 - 2¹⁶ = 68873863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68939309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44264 + ... + 45794.

It is an arithmetic number, because the mean of its divisors is an integer number (8863386).

Almost surely, 2^68939399 is an apocalyptic number.

68939399 is a deficient number, since it is larger than the sum of its proper divisors (1967689).

68939399 is a wasteful number, since it uses less digits than its factorization.

68939399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785.

The product of its digits is 2834352, while the sum is 56.

The square root of 68939399 is about 8302.9753100922. The cubic root of 68939399 is about 410.0364809895.

The spelling of 68939399 in words is "sixty-eight million, nine hundred thirty-nine thousand, three hundred ninety-nine".